Explanation:
A chemical reaction is one in which a chemical change occurs.
During a chemical change;
- The process is irreversible
- New kinds of matter produced
- There is a change in mass
Based on these premise;
Baking cake batter is a chemical reaction because you cannot reverse the process
Shredding a paper is not a chemical reaction because no new kind of matter is produced.
Twisting of a metal wire is not a chemical reaction
Yellowing of newspaper in sunlight is a chemical change. The process cannot be reversed
Answer:
6.94 × 10⁴ J
Explanation:
We can calculate the work (W) associated with the compression of a gas at constant pressure using the following expression:
W = -P . ΔV
where,
P is the external pressure
ΔV is the change in the volume
Knowing that 1 atm.L = 101.325 J, the work of compression is:
The positive sign of the work means that the surroundings do work on the system.
The answer is B=1
-2(3b-2)=8b-10
-6b+4=8b-10
-14b+4=-10
-14b=-14
B=1
Atoms of the same elements differing in the number of neutrons in their nuclei are known as isotopes. Thus, isotopes of an element have the same atomic number but different atomic mass number. Isotopes of an element have similar chemical properties but different physical properties.
